After-Hours Buzz: GRPN, YUM, ZUMZ & More

Check out which companies are making headlines after the bell Thursday:

Zynga and Facebook - Facebook will no longer be prohibited from developing its own games, starting March 31, 2013, per new agreements with Zynga. Facebook shares edged higher, while Zynga tumbled in extended-hours trading. (Click here for after-hours quotes.)

Groupon - The daily deal site's CEO Andrew Mason will not be replaced in the short term, according to Bloomberg. Earlier this week, AllThingsD reported that the company's board had been discussing making leadership changes, including bringing in a new CEO. Shares tumbled in extended-hours trading. (Click here for after-hours quote.)

Yum Brands - The parent company of KFC and Pizza Hut confirmed its full-year 2012 EPS guidance of at least $3.24 a share against expectations for $3.28 a share. In addition, the company said it sees 2013 earnings growth of at least 10 percent. (Click here for after-hours quote.)

Zumiez - he apparel store posted earnings of 40 cents a share on revenue of $180 million, missing expectations for 47 cents a share on revenue of $182 million. In addition, the company handed in current quarter earnings and sales guidance that were lower than forecasts, sending shares sharply lower in extended-hours trading. (Click here for after-hours quote.)

Ulta Salon - The beautystore chain posted earnings of 59 cents a share on revenue of $506 million, edging past expectations for 56 cents a share on sales of $504 million. In addition, the company handed in current-quarter guidance that were better than estimates and said it will open about 125 new stores next year. Shares edged higher in extended-hours trading. (Click here for after-hours quote.)

Splunk - he software company posted a loss of a penny a share, excluding one-time items, on revenue of $52 million. Analysts expected the company to post a loss of 2 cents a share on revenue of $47 million. In addition, the company handed in full-year 2013 revenue guidance that edged past expectations, sending shares higher in extended-hours trading. (Click here for after-hours quote.)

National Beverage - The beverage manufacturer declared a special dividend of $2.55 a share. The company initially announced its intention to declare a special dividend last week. Shares climbed in extended-hours trading. (Click here for after-hours quote.)

Avago Tech - The semiconductor company posted earnings of 77 cents a share, ex-items, on revenue of $618 million, beating projections for 67 cents a share on sales of $615 million. Still, the company said it sees current quarter revenue down between 5 and 9 percent sequentially, sending shares lower in extended-hours trading. (Click here for after-hours quote.)